title: Valvular xenograft to bioprosthesis.
authors.forename: W D
authors.initials: WD
authors.lastname: Hancock
mesh_terms: D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006351:Heart Valves / Q000637:transplantation*; D006801:Humans; D014183:Transplantation, Heterologous